Assigktob to the estgebsoll milling



L' R. JOHNSON. DRUM TYPE CIBNHNUOUS MELLING NlACHlNh.

MPLlCATlUN FELED AUG. 30, 1920! J. 9.. JOHNSON.

URW i YYPE CUNHNUOUS MILUNG MACHINE.

APPLICAHON fiLED wean. 1920,

. Patented May 2, 1922.

4 SHEETS$HEET 2.

J. R. JOHNSON 02mm TYPE commudus MiLHN G mcmtm APPLlCATiUN FILED nusmu. was. 1 ,414 ,812c Patent/ed May 2, 1922.

4 SHEETS-SHEET 3.

d f 4 INVENTOR.

ATTORNEY.

J R. JOHNSON. DRUM TYPE commuous MILLING MACHtNE APPLICATION HLEE) AUG-30.1920

Patented May 2, 1922.

4 SHEEYS -SHEET 4.

UNITED STATES PATENT orrica.

JOHN R. JOHNSON, OF ROCKFORD, ILLINOIS, ASSIGNOR TO THE IiN GERSOLL MILLING MACHINE COMYANY, OF ROCKFORD, ILLINOIS. A CORPORATION OF ILLINOIS.

DRUM TYPE CONTINUOUS-MILLING MACHINE.

Specification of Letters Patent.

Patented May2,192-2.

To all 'whom it may concern..-

Be it known that I, Jorm ll. Jonx'son, a citizen of the United States, residing at Rockford, in the county of \Vinnebago and State of Illinois, have invented certain new and useful Improvements in Drum-Type Continuous-Milling Machines, of which the following is a specification.

This invention pertaining in general to the art of milling machines has more particular referenceto the drum type continuous milling machines, so called, because a work-carrying drumor table is continuously revolved and carries the work-pieces in succession past the milling cutters. By reason of this con struction, it is not necessary to stop the mashine to change the work pieces, since the rotation of the drum is continuous and the operator removes the finished castings at a loading station and replaces them with rough castings.

One of the primary objects of this invention is to provide a drum type continuous milling machine'of novel construction which shall enable accurate and economical production in the surface milling of castings. The novel design and organization contemplated bythis invention, while being articularly efficient for the handling of arge work pieces, such as motor castings, is nevertheless, equally 'well ada oted for surface milling various othe parts. "he principles involved herein are, however, best suited to what might be termed a single purpose machine, and in this sense it should be understood that where production warrants, the machine should be especially designed for each particular purpose so as to possess those characteristics most eHicicut am the purpose in mind. i

Another important object of my invention 'is to provide a drum type milling machine having a worlccarrying drum and cutter spindles mounted on spaced upri ht housings so as to insure rigidity between t 1e work and cutters and to romote smooth, cutting and economy in milling operations. More partic ularly, I have provided a milling machine characterized by spaced upright housings held in rigid relation, a work-carrying drum supported for rotation upon and between the housings and adapted for carrying workpieces in circumferentially spaced relation so that when the drum is revolved the work pieces may be loaded at one side of the ma chine. and cutters so mounted on the housings as to mill the work-pieces as they are carried in succession past the cutters and so as to be accessible from the side of the machine opposite from the loading station.

milling operations may be accurately and ex editiously performed.

l'ly invention also contemplates the provision of a continuous milling machine of the drum type. embodying novel mechanism for driving the work-carrying drum and the cutter spindles.

Still another object is to provide in a milling machine, a pair of roughing and finishing cutter spindle heads or saddles so arranged that the cutters of each pair simultaneously engage op osed surfaces of a workpiece as it is movec between the cutters by the rotating drum: and to provide for adjustment of these cutter spindle heads with respectto the axis of rotation of the drum for the purpose of accommodating such cutters to the path of the work to be surfaced.

' Other objects and attendant advantages will be appreciated by those familiar with this art as the invention becomes better understood by reference to the following description when considered in connection with the accompanying drawings, in which-- Figure 1 is a front elevation of a continuous milling machine embodying my invention;

Fig. 2, a plan view of the machine;

- F 3, an end elevation of the machine looking at the left-hand end of Fig. 1;

Fi s. 4t and 5, sectional views taken substantially on lines 44= and 5-5 of Fi n 1, with the lower spindle heads remove: in

Fig. 5.

*ig. 6, a fragmentary vertical sectional view taken centrally through the lower left hand cutter head shown in Fig. 1; and

Fig. 7', an enlarged top view of a motor castinw clamped to the drum in position to be m' led. a

In the present application, my invention is embodied in a machine particularly designed for surface milling the opposite ends of a motor castin by roughing and finishing operations. in this case, the roughing and finishing cutters simultaneously mill two castings, that is, while one casting is passing between and being surfaced by the roughin cutters another is passing between.

the finis ing cutters. In view of the relatively large size of these castings and of the difliculties imposed when milling such large surfaces at one time, it is imperative in order to obtain accuracy and large production with a machine occupying a small floor space, that the operating parts shall be arranged in a most practical co-operative relation and so -constructed and proportioned as to, transmit the required, forces directl and efficiently. It will be manifest, t erefore, to those familiar with this art, that-by the provision of suitable fixtures on the work-carrying drum, castings or work-pieces .of various other, shapes and proportions mi ht be surface-milled with a machine of t is type, especially in view of the fact that a considerable range of adjustment may be had to position the cutters in proper relation to the work; and in the event that a particular work-piece warrants large production, my invention contemplates the provision of a special-purpose machine for such work, embodying the principles of invention herein disclosed.

In the present embodiment, the machine comprisesgenerally stated, a bed plate 8 upon which is rigidly mounted in laterally spaced relation, a pair of upright columns housings!) and 11 rigidly joined at their upper ends by a top plate 12. A main. drum shaft. 13 interposed between and 'ournal'ed in hearings in the housings 9 an 11, carries ,therebetween a work a drum or table ripherally equipped with a plurality of iitures for carryingwork-pieces in circumferentially spaced relation. Upon each side housing is mounted for vertical adjustment, 9. pair of spindle heads, one carrying a roughing cutter and the other a finis ing cutter; and these heads are so arranged in opposed relation that the rou hing cutters will simultaneously mill cnc surfaces on each workieceas it is moved between the cutters, am at the same time the roughmilled surface on the next preceding work piece will be finished-by the finishing cutters. Suitable mechanism is provided .for simultaneously. revolving the drum shaft and cutters at appropriate speeds so that the operation is automatic, except for load lug and unloading. I

eferringnow more particularly to Fig. of the drawings, it will be observed that the side columns or'housings 9 and 11 are of the hollow column type and that each is shaped to provide substantially midway of its height a horizontal hearing 14 of substantial length in which the main drum shaft 13 is journaled. It will also be observed that this drum shaft is U'i' very substantial )roportions for carrying the heavy castings and transmitti n the powerful feed necessary to eflect the heavy surface millingoperations without. vibration. This shaft equipped with an annular locatin collar 15 bearin against the outer side of the housing 9, is he (1 against axial displacement by a nut 16 threaded on the shaft for holding the work-carrying drum 17 against the inner shoulder 18 of the housing 9. The drum shaft has fixedly mounted on each outer end a worm gear 19 meshing with a worm 21; and additional bearings 22 are provided for the ,drum shaft between the worm wheels and the adjacent. housings, these hearings suitable chain of reduction gearing from an i electric motor 32 mounted on the top plate.

The train of gearingshown comprises a motor pinion 33 meshing with a gear fixed to a shaft 35 which shaft is in driving connection with the shaft 3l-through the intermediary of gears 36, shaft 37, gears 38, shaft 39 and gears ll. It is, of course, obvious that any suitable means may be employed for driving the shaft 31,, the gearing shown being particularly adapted for the present machine. By means of this drive the work drum will. be slowly revolved in a feed move ment in a clockwise direction, viewing Fi 4.

he Work-carryingdrum or table 17 is of sectional construction comprising in this instancc two half sections 42 and -13 shaped to jointly provide a hub 5H. fitting the central portion of the shaft 13 van'd clamped thereto by means of bolts 45. Suitable menus may be employed for effecting a rigid driving connection betwenithe drum and shaft us by means of keys 46. The drum is shaped on its periphery to provide a plurality, six in the present case, of work-supporting tables or surfaces 47 upon which the work-pieces 48 may be secured by suitable fixtures. In the present example, the work-pieces in the form of motor castings are located in position by studs 49 and securely clamped to the drum by a clamping bar 51. attached to clamping posts 52, which are rigidly secured to the drum It will be manifest viewing being supported by suitable brackets 23,

Fig. 7, that upon loosening the nuts 53 on the outer ends of the posts, the clamping bar 51 right housings betwcennnd :upon which is revolubly mounted a work-carrying drum and upon ,which is further mounted any suitable numberdof milling cutter spindles adapted to mill thewvorkieces as they are carried in succession .by tiie drum past the cutters, and suitable driving mechanism for the drum and spindles preferably including a motor and reductiongearing mounted on a top structure :rfigidly joining the upper vends of the housings. The term drum in connection with the work. carrier is used broadly in theclaims and signifies any suitable structure :for carrying .the work-pieces in circumferentially spaced relation and. adapted to :be rotated.

It i believed hat the foregoing conveys a clear understanding of sthe objects and urin'ciples .oiytmy invention, and while I have illustrated initheidraw-ings but a single working embodiment thereof, it should be understood thatconsidemble change might be made tin the design and arrangement of parts without departing fromt-he spirit and scope of the invention as expressed in the appended claims, in which I claim: I

1. In a milling machine, the-combination of a bed plate, laterally spaced upright housings thereon, means for rigidly connecting the upper ends of the housings, a Work tablerevolubly mounted between and upon-the housings and constructed for carrying tthe WOtkrPiQOBS in circumferentially spaced .relation,;and apair of spindle heads mounted oneach housing,one equipped with a roughi andthe other with a finishing surface m1 ling-cutter, the cutters being so arranged .in o posed relation as to successively mill en surfaces of the work-pieces paslsed between the cutters by rotation of the tab e.

2. Amilling machine of the character dc scribed comprising a vbed plate, laterally spaced upright housings mounted on the bed plate, a top plate connecting the upper ends of the housings, a drunrshaftinterposed between and journaled at its ends in hearings in said housings, a drum mounted on the shaft betwe'enthe housings for carrying in circu'mferentially spaced relation a plurality of work-pieces, and a face milling cutter mounted on each housing, said cutter being disposed in substantially co-axial relation and adapted to simultaneously surface-mill the opposite-ends ofeachw'orlr-piece us it is moved between the cutters by rotation of the drum.

3. A milling machineof the character described oomprising a bed plate, laterally spaced upright housings mounted on the bed plate, a top plate connecting the upper ends of the housings, a drum shaft interposed between and journaled at its ends in bearings in'said housings, a drum mounted on the cutters being adapted-to simultaneously sur-- face mill the opposite ends of each workpiece as it is moved therebetween by rotation of .thedrum. I

4. In a milling machineof the character described, the combination of a bed plate, laterally spaced upright housingsthereon, a main drum shaft. horizontally mounted in hearings in said housings and'extendin'g be' yond theoutersides thereof, mechanism for revolving said shaft, including a wormgear fixed to each endiof the shaft, means on the shaft intermediate the housings for carrying a plurality of work-pieces in. circumferentiallyspacedrelation,-and a horizontal] y disposed spindle head mounted on each housing and equipped with a face milling cutter. said cutters being adapted to surface mill opposite end portions of the work-pieces as they are moved thercbetwecn by rotation of said shaft.

5. A milling machine of the character described comprising a base having late-rally spaced upri ht housings equipped with vertical ways disposed substantially in alignment transversely of the machine, a shaft interposed between and journaled in bearings in said housings, means on said shaft intermediate the housings for carrying a plurality of work-pieces in circumferentially spaced relation, a pair of spindlesadjust ably mounted one above the other on said ways of each housing, and a roughing surface milling cutter carried by one of the spindles on each housing and a finishing surface milling cutter carried by the other spindle on each housing, whereby each workpiece, as it is carried between said cutter.- by rotation of the shaft, will be milled at both ends by a pair of roughing cutters and a pair of finishing cutters.

6. A drum type milling machine romprising laterally spaced upright housings. a drum interposed between and supported by bearings in said housings and adapted to carry a plurality of work-pieces in circumferentially spaced relation, and a pair of spindles mounted one above the other on each housing, companion spindles being dis posed in substantially coaxial relation, one spindle on each housing being equipped with a rou hing surface milling cutter and the other ivith a finishing surface milling cutter whereby the work-pieces will he successively moved between a pair of roughing and finishing surface milling cutters by rotation of the drum 7, A milling machine comprising laterally spaced upright housings, a main drum shaft interposed between and journaled in bearings in said housings, a sectional drum, the sections of which are dctachably secured to said shaft between the housings and are shaped to provide a plurality of peripheral work supports, and acutter spindle mounted on each housing for carrying a face milling cutter, whereby said cutters will surface-mill opposed faces of the work as it is moved between the cutters by rotation of the drum.

8. A continuous milling machine of the character described comprising a base, laterally spaced upright housings on the base, a top plate joining the housings, a work-carrying drum revolubly mounted between and upon said housings, a spindle head vertically adjustable on each housing and adapted to carry a milling cutter between which cutters the work is moved by rotation of the drum, a vertical shaft for driving each cutter spindle, and motor driven mechanism on the top plate for driving said spindle-driving shafts.

9. A continuous milling machine of the character described comprising a base, laterally spaced upright housings on the base, milling cutters carried by said housings, a. top plate joinin the hous1ngs,a work-carrying drum revol ubly mounted between and upon said housin s and adapted to carry work between said cutters, a vertical shaft for driving each cutter spindle, a vertical shaft for driving each end of the drum shaft, and motor driven mechanism on the top plate for driving all of said vertical shafts.

10. Ina mil-ling machine of the character described, a pair of laterally spaced upright housings, a main drum shaft journaled at its end portions in hearings in said housings, a sectional work-carrying drum detachably mounted on. and connected to said shaft between the housings and constructed to carry a plurality of circumferentially spaced workpieces, anut engaged with the shaft for holding said drum against lengthwise movement with respect to the shaft, and spindle heads carryin 'milling cutters adapted to surface mill t e work-pieces carried therebetween by rotation of said shaft.

11. In a milling machine of the character described, the combination of a work table revoluble about a fixed axis and equipped for carrying aplurality of work-pieces in top plate structure rigidly united, a work carrying drum revoluble between and upon the housings for carrying work-pieces in circumferentially spaced relation, a milling cutter mounted on each housing at the inner side thereof, and mechanism for continuous- 1 y revolving the drum and cutters so that the work-pieces will be carried in succession between and be milled by the cutters.

13. A drum type milling machine comprising a base, spaced upright housings rigid on the base, a work-carrying drum supported for rotation upon and between the housings and adapted for carrying work-pieces in circumferentially spaced relation, means for revolving the drum to carry the workpieces in succession past a loading station at one side of said housings, a milling cutter spindle mounted on each housing at the opposite side thereof and accessible from said opposite side, and means for driving'the spindles.

14. A drum ty e milling machine comprising a base, spacec upright housings rigid on the base, a work-carrier rcvolublymounted on said housings and constructed for carrying work-pieces between the housings in circumferentially spaced relation, milling cutters mounted on each housing and adapted to be positioned at different vertically spaced locations thereon, and driving mechanism for revolving the work carrier and the spindles.

15. A milling machine of the character described comprising a base, spaced upright housings rigid on the base and rigidly joined at their upper ends, awork-carrier revolubly mounted on said housings and constructed for carrying work-pieces between the housings in circumferentially spaced relation, the work-carrier being adapted to bc loaded at one side of the maclnne, cutter spindles mounted on the housings adjacent to the opposite side of the machine and adapted for carrying cutters accessible from this side only of the'machine, and mechanism for revolving the work-carrier and spindles.

16. A prising a base, spaced upright housings rigid on the base and each having vertical ways at one side, a top structure rigidly uniting the upper ends of said housings,.awork carrying drum interposed between and revolubly mounted upon said housings and adapted for carrymg work-pieces in circumferentially spaced relation, a spindle saddle vertically adjustable on the ways on each housing, a cutter spindle'journaled in each saddle and adapted for carrying a milling cutter, driving mechanism mounted on said top structure, and a driving connection between said mechanism and 'drum and another between said mechanism and the spindles.

17. A milling machine com risingla base, spaced upright housings rigid. On c base,

carrier and sp'indlesfincluding reduction ing; drum located between an gearing carried by the top structure.

18. A drum type milling machine comprising a base, spaced uprighthousings rigid on the base, atop structure rigidly uniting the upper ends of thehousings, a work-carrylng drum interposed between and revolubly mounted on said housings, a cutter spindle mounted on one of thezhousiugs and adapted for carrying a milling-cutter in position to mill.the;work-pieces carried by the drum, and mechanism mounted on the top structure for revolving; the drum and said snindle.

19. A drumtype milling machine comprisinga base, spaced uprighthousings rigid on the base, a top structure rigidly connecting therupper ends of the housings, a workcarrying drum interposed between and journaled on bearings in said housings, said drum being adapted to1carry circumferentially-spaced'work-pieces past a loading station at one side of the machine, a milling cutter spindlezmounted on each housing at the side opposite said loading station with its cutter-carrying end adjacent to the drum, andmechanism mounted onsaid top struc ture for drivingthe drum and spindles.

20. A drum-type-milling. machine comprising a been having spacedupright side housing's rigid thereonand-rigidly oined at their upper ends by atop structure a work-carryd supported by the housings, said drum being adapted to carry work-pieces in circumferentially spaced relation and to be revolved about a horizontal axis for carrying. the work-pieces successively from a loading station at one sidev of the machine and past milling cutters at another-station on the machine, cutter spindles mounted 0n=the housings and adapted to carry milling cutters intermediate the housings, and mechanism for revolving the work-carrying drum and the cutter spindles.

21. A drum type milling machine comprising a base having spaced upright side iousings rigid thereon and rigidly joined at their upper ends by a top structure, a work-carrying drum located between and supported by the housings, said drum being adapted tocarry work-pieces in circumferentially spaced relation and to be revolved about a horizontal axis for carrying the work-pieces successively from a loading station at one side of the machine past milling cutters at another: station on the machine, a

pair of cutter spindles mounted on each housing at theopposite side of the drum axis from said loading. station, one spindle-being above andtlie other below a horizontal plane intersecting the drum axis, roughing cutters carried by the spindles at' one side of said on and adapted to rotate about ahorizontal.

axis. said housings having vertical ways at one side, spindle saddlesi'mounted ou the ways on each housing and each, equipped with a cutter spindle, means for clamping the spindle saddles at'difierent locations on said ways, and driving mechanism mounted on the'top structure and connected with the drum and spindlesfor continuously revolving the same.

23. A. milling machine, comprisin a rigid frame structure including a pair 0 spaced upright columns, surfacing tools mounted 'on said columns in opposed relation, anda work carrier rotatably carried by and disposed between said columns, so. that one portion thereof is exposed forloading and unload ing purposes, while another portion'thereof is carrying work between said posed. tools.

24. A milling machine,1compr1singa rigid frame structure'includinga pair. of spaced upright columns, surfacing tools mounted on the front faces of said columns, and a drumshaped work carrier disposed: between said columns and mounted to revolveabout a horizontal axis intersecting saidcolumns,

the rear portion of the periphery of said carrier being exposed for loading and unloading purposes while Work mounted on the opposite portion thereof is being carried between uud subjected to the action of said tools.

25. A milling machine, comprising a rigid frame structure including a pair ofspaced upright columns, a work carrying drum disposed between said columns and'mountedto revolve about a horizontal axis intersecting said columns, and a plurality of rotatable surfacing tools mounted upon the front faces of said columns in proximityto the periphery of said drum with their axes of rotation parallel to the axis of said drum, said drum being adapted to convey the work between the toolson the respective columns whereby work surfaces adjacent each end of the drumare simultaneously milled.

JOHN R. JOHNSON; 

